Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dam tra cuu snippets" » "dam trao cuu snippets", "dan tra cuu snippets", "nam tra cuu snippets", "dam tra cau snippets", "dam trau cua snippets", "dam trua cua snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dam tra cuu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dam tra cuu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dam tra cuu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dam tra cuu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.